CN101463894A - Assembled internal gear - Google Patents

Abstract

The invention discloses an assembled internal gear, comprising a ring gear mass and a gear tooth unit comprising at least one gear tooth; the gear tooth unit is arranged at the inner side of the ring gear body along the circumference in parallel, so as to form an internal gear. In the invention, the internal gear adopts an assemblable structure, and the fabrication procedure of the gear tooth is good, so that processing of a hard tooth surface and the high precision internal gear can be completed by a simple technique, thus improving the bearing capacity of a transmission mechanism, reducing vibration and noise and prolonging the service life of a gearing mesh auxiliary; in addition, the assembled internal gear of the invention is especially suitable for the transmission mechanism with a requirement of high precision on the internal gear; moreover, with the application range unrestricted, the assembled internal gear is suitable for gears of any shapes such as involute gear, a circular tooth gear, a straight tooth and a helical tooth and the like and is suitable for common inner gearing transmission, common planetary gearing transmission and planetary transmission with small teeth difference.

Description

Assembled internal gear

technical field

The invention relates to an internal gear, in particular to an assembled internal gear.

Background technique

Compared with ordinary gear transmission, planetary gear transmission has the advantages of small size, small mass, compact structure, large bearing capacity, high transmission efficiency and large transmission ratio. At the same time, planetary gears can perform power splitting when transmitting power. It is coaxial with the output shaft. Therefore, planetary gear transmission is used to replace ordinary gear transmission, and as a reducer, speed increaser and speed change device in various mechanical transmission systems; especially for gears that require small size, small mass, compact structure and high transmission efficiency It is widely used in transmissions and gear transmissions that require differentials.

Internal gear transmission is a necessary meshing method of planetary gears, and one of the key technologies of planetary gear transmissions lies in the precision machining of gears, especially internal gears. With the rapid development of science and technology, the requirements for the standardization, hard tooth surface and high precision of internal gears are getting higher and higher.

In the prior art, due to the limitation of space, methods such as gear shaping, broaching, and forming milling are often used for machining internal gears. It is difficult to achieve high precision and hard tooth surfaces, resulting in vibration, noise, Additional dynamic loads, etc., reduce its load capacity, life and reliability, thus greatly limiting the development and application of planetary gears.

Therefore, there is a need for an internal gear with good processing technology, and a simple process can be used to complete the hard tooth surface and high-precision internal gear processing, thereby improving the bearing capacity of the transmission device, reducing vibration and noise, and extending the service life of the gear meshing pair. service life.

Contents of the invention

In view of this, the object of the present invention is to provide an assembled internal gear, which has good processing technology and can complete hard tooth surface and high-precision internal gear processing by using a simple process, thereby improving the bearing capacity of the transmission device and reducing the Vibration and noise, prolonging the service life of the gear meshing pair.

The assembled internal gear of the present invention includes a ring gear body and a gear tooth unit composed of at least one gear tooth, and the gear tooth unit is arranged in parallel on the inner side of the ring gear body along the circumference to form the internal gear.

Further, the inner side of the ring gear body is provided with an annular groove along the circumference, the gear tooth unit is arranged in the annular groove, and each gear tooth unit is fixed in the annular groove by at least one axial fixing pin or bolt;

Further, retaining rings are respectively provided at both axial ends of the ring gear body, and the annular groove is formed by the ring gear body and the retaining ring;

Further, each gear tooth unit is fixedly arranged in the annular groove by at least two fixed pins or bolts distributed side by side along the circumference;

Further, the inner side of the ring gear body is provided with a fitting groove along the circumference, and the outer side of the gear tooth unit is fixedly provided with a fitting protrusion, and the fitting protrusion of the gear tooth unit is fitted into the fitting groove to form an internal gear;

Further, one end of the fitting groove is closed in the axial direction, and a retaining ring is fixedly arranged at one end; or, the fitting groove is penetrated in the axial direction, and retaining rings are fixedly arranged at both ends of the axial direction;

Further, the ring gear body is provided with a radial hole along the circumference, and a cylindrical protrusion is provided outside the gear tooth unit, and the cylindrical protrusion of the gear tooth unit is inserted into the radial hole to form an internal gear;

Further, the gear tooth unit is composed of one gear tooth.

The beneficial effects of the present invention are: the assembled internal gear of the present invention adopts an assembleable structure, the gear teeth are well processed, and the hard tooth surface and high-precision internal gear processing can be completed by using a simple process, thereby improving the transmission device. It can reduce vibration and noise, prolong the service life of gear meshing pairs, and is especially suitable for transmission devices that require high precision for internal teeth; the invention is suitable for involute gears, arc gears, straight teeth and helical teeth, etc. Gears with any tooth shape are suitable for ordinary internal meshing transmission, ordinary planetary gear transmission or small tooth difference planetary transmission, and the application range is not limited.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

FIG. 1 is a schematic structural view of Embodiment 1 of the present invention;

Fig. 2 is a sectional view along A-A direction of Fig. 1;

Fig. 3 is a schematic structural diagram of a gear unit according to Embodiment 1 of the present invention;

4 is a schematic structural diagram of Embodiment 2 of the present invention;

Fig. 5 is a schematic structural diagram of a gear unit according to Embodiment 2 of the present invention;

Figure 6 is a schematic cross-sectional view of Embodiment 2 of the present invention;

FIG. 7 is a schematic structural diagram of Embodiment 3 of the present invention;

Fig. 8 is a schematic structural diagram of a gear tooth unit according to Embodiment 3 of the present invention.

Detailed ways

Embodiment one

Figure 1 is a schematic structural view of Embodiment 1 of the present invention, Figure 2 is a sectional view along the direction A-A of Figure 1 , and Figure 3 is a schematic structural view of the gear unit of Embodiment 1 of the present invention, as shown in the figure: the assembled internal gear of this embodiment , comprising a ring gear body 1 and a gear tooth unit 2 composed of one gear tooth, an annular groove 11 is arranged on the inner side of the ring gear body 1 along the circumference;

Ring gear body 1 is provided with retaining rings 11a at both ends in the axial direction. Annular groove 11 is composed of ring gear body 1 and retaining ring 11a. Each tooth unit 2 is fixed in annular groove 11 by an axial fixed pin 3. Multiple The gear tooth unit 2 is arranged side by side along the circumference and fixedly arranged in the annular groove 11 inside the ring gear body 1 to form an internal gear;

Of course, each gear tooth unit 1 can also be fixedly arranged in the annular groove 11 by at least two fixed pins 3 distributed side by side along the circumference, so that each gear tooth unit can be assembled firmly no matter from the radial direction or the axial direction, and the internal gear transmission Stable; the connecting piece is not limited to the fixed pin 3, it can also be a bolt, all can achieve the purpose of the invention; Without departing from the purpose of the present invention, at the same time, several gear teeth form a gear unit integrally, which is also beneficial to the stability of the structure.

Embodiment two

Fig. 4 is a schematic structural diagram of Embodiment 2 of the present invention, Fig. 5 is a schematic structural diagram of a gear unit of Embodiment 2 of the present invention, and Fig. 6 is a schematic cross-sectional view of Embodiment 2 of the present invention, as shown in the figure: the assembly type of this embodiment The internal gear includes a ring gear body 1 and a gear tooth unit 2 composed of a gear tooth. The inner side of the ring gear body 1 is provided with a plurality of fitting grooves 1a along the circumference, and the outer side of each gear tooth unit 2 is fixedly arranged with a fitting protrusion 21. The fitting protrusions 21 of each gear tooth unit 2 are fitted one by one in the fitting groove 1a to form an internal gear;

In this embodiment, the fitting groove 1a penetrates axially, and retaining rings 12 are respectively fixed at both axial ends to ensure the axial positioning of the gear unit 2, thereby ensuring the stability of the internal gear structure;

Of course, the fitting groove 1a can also be closed at one end in the axial direction, and the retaining ring 12 is fixedly arranged at one end, so that the assembled internal gear will be more stable.

Embodiment three

Fig. 7 is a schematic structural view of the third embodiment of the present invention, and Fig. 8 is a schematic structural view of the gear tooth unit of the third embodiment of the present invention, as shown in the figure: the assembled internal gear of this embodiment includes a ring gear body 1 and a plurality of A gear tooth unit 2 composed of a gear tooth, the ring gear body 1 is provided with a plurality of radial holes 1b along the circumference, and a cylindrical protrusion 22 is provided on the outside of each gear tooth unit 2, and the cylindrical protrusions 22 of the gear tooth unit 2 are inserted one by one An internal gear is formed in the radial hole 1b; the structure is simple, easy to process and easy to assemble.

The structures in the above embodiments are applicable to gears with any tooth shape such as involute gears, arc gears, straight teeth and helical teeth, and are suitable for ordinary internal meshing transmissions, and can also be applied to ordinary planetary gear transmissions or planetary gears with few tooth differences Transmission, the application range is not limited.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be carried out Modifications or equivalent replacements without departing from the spirit and scope of the technical solution of the present invention shall be covered by the claims of the present invention.

Claims (8)

1. An assembled internal gear, characterized in that it comprises a ring gear body (1) and a gear unit (2) consisting of at least one gear tooth, and the gear unit (2) is arranged in parallel on the ring gear along the circumference Body (1) inner side constitutes internal gear. 2. The assembled internal gear according to claim 1, characterized in that: the inner side of the ring gear body (1) is provided with an annular groove (11) along the circumference, and the gear tooth unit (2) is arranged in the annular groove, Each gear tooth unit (2) is fixed in the annular groove (11) by at least one axial fixed pin (3) or bolt. 3. The assembled internal gear according to claim 2, characterized in that: retaining rings (11a) are respectively provided at both axial ends of the ring gear body (1), and the ring groove (11) is defined by the ring gear body ( 1) and retaining ring (11a). 4. The assembled internal gear according to claim 3, characterized in that: each gear tooth unit (1) is fixedly arranged in the annular groove ( 11) inside. 5. The assembled internal gear according to claim 1, characterized in that: the inner side of the ring gear body (1) is provided with a fitting groove (1a) along the circumference, and the outer side of the gear tooth unit (2) is fixed with a fitting protrusion ( 21), the fitting protrusion (21) of the gear tooth unit (2) is fitted into the fitting groove (1a) to form an internal gear. 6. The assembled internal gear according to claim 5, characterized in that: one axial end of the fitting groove (1a) is closed, and a retaining ring (12) is fixed at one end; or, the fitting groove (1a) is axially Through, retaining rings (12) are fixedly arranged at both ends of the axial direction respectively. 7. The assembled internal gear according to claim 1, characterized in that: the ring gear body (1) is provided with radial holes (1b) along the circumference, and a cylindrical protrusion (22) is provided outside the gear tooth unit (2) , the cylindrical protrusion (22) of the gear tooth unit (2) is inserted into the radial hole (1b) to form an internal gear. 8. The assembled internal gear according to claim 6, characterized in that the gear tooth unit (2) consists of one gear tooth.

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